John Onyemaechi Nnadi, MD
Infectious Disease · Internal Medicine (CMS) · Baton Rouge, LA
At a glance
17000 Medical Center Dr, Baton Rouge, LA 70816-3246
NPPES record updated Nov 17, 2022. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
17000 Medical Center DrBaton Rouge, LA 70816-3246
Additional reported practice locations
7777 Hennessy Blvd Ste 701Baton Rouge, LA 708084370
Phone: 2257655864
Fax: 2257652013 5000 Hennessy Blvd
Baton Rouge, LA 708084375
Phone: 2257655864
Fax: 2257652013
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 1999
- CMS specialties
- Infectious Disease · Internal Medicine
CMS reports telehealth services for this clinician. Confirm current services and availability with the practice.
Practice groups
- Bayhealth Medical Center, Inc
- Homedica Of Louisiana, Llc
- Ochsner Clinic Llc
- St Joseph Hospital
- Stem Medical Group Pc
Reported hospital affiliations
- Baton Rouge General Medical Center Baton Rouge, LA
- Havasu Regional Medical Center Lake Havasu City, AZ
- Lourdes Medical Center Pasco, WA
- Ochsner Medical Center - Baton Rouge Baton Rouge, LA
- Trios Health Kennewick, WA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Infectious Disease · Internal Medicine (CMS)
- Taxonomy code
- 207RI0200X
- Enumeration date
- Dec 2, 2008
- Record updated
- Nov 17, 2022
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD
Reported taxonomies and licenses
207R00000X
License reported: 20962 MS
207R00000X
License reported: MD.202997 LA
207RI0200X
License reported: 20962 MS
207RI0200X
License reported: C1-0025159 DE
207RI0200X · Primary
License reported: MD.202997 LA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
17000 Medical Center DrBaton Rouge, LA 70816-3246
- Phone
- (225) 752-2470
Mailing address
2925 TRADITION AVEBATON ROUGE, LA 708100336
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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